Soldering apparatus for band-saws.



N0. 735,574. PATENTED'AUG. 4, v1903 G. OTT. S OLDERING APPARATUS FOR BAND SAWS,

I APPLICATION FILED JULY 1, 1902.

I0 HODEL UNITED PST-A-TES mated August 4, 190a.

PATENT OFFICE.

eEoRe orr, OF'ULM, GERMANY.

SPECIFICATION forming part of Letters Patent No. 735,574, dated August 4, 1903. Application filed July 1, 190?. Serial No. 114,017. (No model.)

T0 or whom it may concern:

Be it known that I, Gnone Orr, a subject of the King of Wiirtemberg, residing at Ulmon-the-Donau, in the Kingdom of Wurtemberg, and Empire of Germany, have invented a new and useful Improved Soldering Apparatus for Band-Saws, of which the following is a specification.

My invention relates to an improved soldering apparatus for band-saws.

The apparatus hitherto employed for solderingband-saws have the disadvantage that the thin flame which serves for heating the sutures is free and thereby exposed to the aircurrents, so that it is impossible to concentrate the heat of the soldering-fiame on the suture only, and the" continuous cooling .of the latter by the air which surrounds andpasses over it prevents a quick and reliable heating of the solder, such as is necessary for bringing it to the melting-point.

The object of the present invention is to concentrate the whole of the heat generated by the thin flame employed for the soldering on the suture itself and to shut off the heating-flame and the Whole suture from the surrounding air, so that no objectionable action may be caused by air-currents.

In the accompanying drawings the improved soldering apparatus for band-saws is illustrated. 7

Figure 1 is a front view, Figs. 2 and 3 transverse vertical sections showing the apparatus in different positions, and Fig. 4 a plan of the same. l I

The apparatus consists of two trestles a and b, firmly connected with one another by means of a horseshoe-shaped 'piece 0, so as to form a U-shaped frame in plan, Fig. 4. The surfaces of these trestles lie in the same plane and serve as supports for the ends of the sawblade to be soldered, which-can be secured in proper position relatively to each other by means of clamping devices provided on the trestles. 111 the example illustrated in the drawings the clamping devices consist of setscrews cl, which are arranged in arms (I, that extend over the saw-blade.

-A novel and peculiar feature is the arrangement of a fireproof casing e, which is open in front and furnished with transverse'slots f in the sides for admitting the saw-blades, Fig.

3. The soldering-flame is directed into the I interior of the casing e and the whole efiect thereof concentrated on the suture, the flame as well as the latter being likewise protected against the action of air-currents and the surrounding atmosphere. In this manner an exceedingly quick melting of the solder is effected.

- After the solder is melted it is expedient to remove the casing e, so that the parts of the band-saw to be soldered together may be com pressed by means of pressing-tongs. If the casing e be fixed in relation to the suture, the clear height thereof must be such as to allow of the introduction ofthe jaws of the pressingtongs. Forthis reason in the example illustrated the casing e is arranged so as to-be movable transversely to the saw-blade g, the movement of the casing being effected by means of the hand-lever h, which is pivoted to the frame part c of the apparatus by means ofa bolt 1', so as to be turned in the vertical plane. This hand-lever It has a second arm 70, the free end of which is connected with the casing e by means of the links Z.

If the lever 72/ be moved into the position shown in Fig. 3, the casing Q will be pushed over the suturethat'is to say, the ends of the band-sawthe saw entering the slots f, formed in the sides of the casing. When the lever h is lowered into the position shown in Fig. 2, the casing e is drawn away from the point where the soldering takes place, so as to allow of the compression of the ends of thesaw by means of pressing-tongs.

In using a'particular kind of pressing-tongs for compressing the ends of the band-saw at the suture after the solder has melted it is necessary to work the lever h and also the tongs. 1f the compression of the suture is to be effected as quickly and reliably as possible, it is desirable to employ two workmen for working the apparatusone who removes the casing c and the soldering-flame fromthe suture by means of the lever h and another who holds the tongs ready for compressing the ends of the saw, so as to be able to at once manipulate suitably. In the example illustrated this troublesome working of the apparatus is avoided, the tongs employed for compressing the ends of the saw at the suture being provided in the apparatus itself and connected therewith by means of the lever h, which serves for pushing the casingebackward and forward. For this purpose one jaw m of the pressing-tongs is attached to the hand-lever h, the second jaw n being fixed to an arm of a lever turning in the vertical plane around a pin 19, while the other arm (1 of this lever is connected with the hand-lever h by means of a rod 9. The connecting-rod r straddles the pin 5 in the lever-arm q by means of its lower forked end, so that the lever h can turn to a relatively greater extent than the lever 0 q, whereby the height of the apparatus is reduced.

In forcing the handle 71, with jaw m downward the rod 0, acting on the pins of the arm q, causes the jaw n on the arm 0 to move up wardly, it being understood that the arms 0 and q are made of one piece and pivoted at 1). By removing the pressure from the handle 7L the arms 0 and q occupy a position as shown in Fig. 3, while the handle h, due to the slotted lower end of the rod 9', may be raised.

\Vhen the casing e is in the position shown in Fig. 3, the jaws m and n are open. The

solder being melted, the hand-lever h is lowered, whereby the casing e is drawn back and the jaws m and n at the same time moved toward one another, so as to compress the ends of the saw at the suture in the closing position shown in Fig. 2.

dered joint, and means which cause, firstly the closing of the jaws when the casing is being moved away from the saw-blade, and secondly the opening of the jaws when the casing is being moved over the saw-blade,substantially as and for the purposes set forth.

2. Soldering apparatus forband-saws, comprising in combination with a frame and clamps, a fireproof easing slidably supported in a guide of the said frame, a hand-lever pivoted to the latter, a pressing-jaw provided on the handlever, another pressing-jaw pivoted to the frame, and means for connecting this jaw with the said lever, substantially as and for the purpose described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GG. OTT. \Vitnesses:

WM. HAHN, ERNST ENTENMAN. 

